Evaporator

ABSTRACT

An evaporator has an outer housing with a first hole, a second hole and an outlet on a bottom thereof and an inlet and a dissipating hole at a top thereof. An evaporating device is received in the outer housing, which has fin assemblies, boards between the fin assemblies, two lateral plates and a refrigerant tube. Each board has two flat sides and two curved sides, and the lateral plates are attached on the flat sides of the boards respectively. Each board has a gap at an end thereof, which the gaps of the neighboring boards are arranged at opposite sides respectively. The refrigerant tube is twisted and runs through the fin assemblies and the boards. The refrigerant tube has a refrigerant inlet and a refrigerant outlet at opposite ends to be extruded out of the outer housing via the fist hole and the second hole respectively.

BACKGROUND OF THE INVENTION

1. Field of the Invention

The present invention relates generally to an evaporator, and more particularly to an evaporator capable of lowering the temperature of thermal source.

2. Description of the Related Art

FIG. 5 and FIG. 6 show a conventional evaporator 7, which has a barrel 6 with an inlet 61 at a bottom thereof and an outlet 62 at a top thereof. A plurality of fin assemblies 63 in a series connection are received in the barrel 6, and a plurality of boards 64 are provided between the fin assemblies 63. The boards 64 are round disks having a flat side 641 respectively. The flat sides 641 of the neighboring boards 64 are arranged at opposite sides respectively. Two twisted refrigerant tubes 65 run through the fin assemblies 63 and the boards 64. The refrigerant tubes 65 run through the boards 64 at portions beyond the fin assemblies 63 also, which opposite ends are defined as refrigerant inlets 651 and refrigerant outlets 652. It has a greater area for thermal exchange to increase the efficiency of the evaporator 7.

The conventional evaporator indeed has functions of lowering temperature and increasing of thermal exchange efficiency. But the boards are greater than the fin assemblies, so that the refrigerant tubes have sections exposed out of the fin assemblies. As a result, the exposed sections of the refrigerant tubes decrease the speed of thermal exchange that causes the conventional evaporator still having space to improve the capacities of lowering temperature and increasing of thermal exchange efficiency.

SUMMARY OF THE INVENTION

The primary objective of the present invention is to provide an evaporator, which each of the fin assemblies is provided with two lateral plates at opposite sides, such that each of the fin assemblies only has one side in and one side out because of the boards and the lateral plates. As a result, the fin assemblies provide a superior performance in thermal exchange to lower the temperature and increase the thermal exchange efficiency.

According to the objective of the present invention, an evaporator comprises an outer housing having a first hole, a second hole and an outlet between the first hole and a second hole on a bottom thereof and an inlet and a dissipating hole at a top thereof. An evaporating device is received in the outer housing, which has a plurality of fin assemblies, a plurality of boards between the fin assemblies, two lateral plates and a refrigerant tube. Each of the boards has two substantially parallel flat sides and two curved sides, and the lateral plates are attached on the flat sides of the boards respectively to shield the fin assemblies, such that each of the fin assemblies only has one side in and one side out. Each of the boards has a gap at an end thereof, which the gaps of the neighboring boards are arranged at opposite sides respectively. A sealing board is fixed on top ends of the lateral plates above the top board, which has a tube connected to the inlet of the outer housing. The refrigerant tube is twisted and runs through the fin assemblies and the boards in a vertical orientation. The refrigerant tube has a refrigerant inlet and a refrigerant outlet at opposite ends thereof to be extruded out of the outer housing via the fist hole and the second hole respectively for circulation of a refrigerant. Water in the outer housing is exhausted out via the outlet.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a perspective view of a preferred embodiment of the present invention;

FIG. 2 and FIG. 3 are sectional views of the preferred embodiment of the present invention along different orientations;

FIG. 4 is a sectional view of the preferred embodiment of the present invention, showing the relationship of the fin assembly, the out housing and the refrigerant tube;

FIG. 5 is a perspective view of the conventional evaporator, and FIG. 6 is a sectional view of FIG. 5.

DETAILED DESCRIPTION OF THE INVENTION

As shown in FIG. 1 to FIG. 4, an evaporator of the preferred embodiment of the present invention comprises an outer housing 2, which is a round column and has a first hole 21, a second hole 22 and an outlet 23 between the first hole 21 and the second hole 22 at a bottom thereof and an inlet 24 and a dissipating hole 25 at a top thereof. The outer housing 2 is hollow to receive an evaporating device 3 therein, and there are two passageways 26 and 27 in the outer housing 2 between the evaporating device 3 and an interior sidewall of the outer housing 2. The evaporating device 3 has a plurality of fin assemblies 31, boards 32 and a refrigerant tube 33. The fin assemblies 31 are stacked, and the boards are arranged between the fin assemblies 31 respectively. Each of the boards 32 has two flat sides 321 and two curved sides 322. Two lateral plates 323 are attached on the flat sides 321 of the boards 32 and the fin assemblies 31 to shield the fin assemblies 31, such that the fin assemblies 31 only have one side in and one side out respectively. Each of the boards further has a gap 324. In the present invention, a sealing board 34 is fixed on top ends of the lateral plates 323 above the top board 32, which has a tube 341 connected to the inlet 24 of the outer housing 2 to issue the thermal source into the evaporating device 3. The gap 324 of the neighboring boards 32 are arranged at opposite sides. A twisted refrigerant tube 33 runs through the fin assemblies 31 and boards 32, which has a refrigerant inlet 331 and a refrigerant outlet 332 extruded out of the out housing 2 via the first hole 21 and second hole 22 respectively for refrigerant circulation. Water formed in the thermal exchange process flows out of the out housing 2 via the outlet 23 to increase the thermal exchange efficiency of the evaporator 1 of the present invention.

As shown in FIG. 2 and FIG. 3, while a thermal source is issued into the evaporating device 3 from the inlet 24 of the out housing 2 to the gap 324 of the board 32 via the tube 341, the thermal source is concentrated in the fin assemblies because of the isolation of the board 32 and lateral plates 323, so that there is a greater thermal conduction between the thermal source and the fin assemblies 31 to dissipate heat. Because of the greater surface area of the fin assemblies 31, the evaporator 1 of the present invention has a well performance in lowering temperature and thermal exchange efficiency.

In addition, the refrigerant tube 33 runs through the fin assemblies 31 and boards 32 along a vertical orientation and in a uniform distribution that decrease the distance between the refrigerant tube 33 and the fin assemblies 31 to exchange heat via the refrigerant tube 33 rapidly and greatly for increasing of the thermal exchange efficiency.

The gaps 324 of the boards 32 and the lateral plate for isolation of the fin assemblies 31 provide a guiding effect to the thermal source to guide the thermal source only to the fin assemblies 31 from the gaps 324 but no where. In other words, all the thermal source is guided to the fin assemblies 31 for thermal exchange via the refrigerant tube 33 that maximizes the efficiency of thermal exchange greatly. The waste heat is exhausted out of the outer housing 2 via the passageways 26 and 27.

In conclusion, the evaporator of the present invention provides the refrigerant tube running through the fin assemblies and boards along a vertical orientation and in a uniform distribution to decrease the distance between the refrigerant tube and the fin assemblies. The design of the gaps of the boards and the lateral plate for isolation of the fin assemblies and the greater surface area of the fin assemblies 31, as shown in FIG. 4, provides a superior performance of thermal exchange in a short period. The present invention has the functions of lowering temperature and increasing the efficiency of thermal exchange. 

1. An evaporator, comprising: an outer housing having a first hole, a second hole and an outlet between the first hole and a second hole on a bottom thereof and an inlet and a dissipating hole at a top thereof; an evaporating device received in the outer housing, which has a plurality of fin assemblies, a plurality of boards between the fin assemblies, two lateral plates and a refrigerant tube; wherein each of the boards has two substantially parallel flat sides and two curved sides, and the lateral plates are attached on the flat sides of the boards respectively to shield the fin assemblies, such that each of the fin assemblies only has one side in and one side out; wherein each of the boards has a gap at an end thereof, which the gaps of the neighboring boards are arranged at opposite sides respectively, and a sealing board is fixed on top ends of the lateral plates above the top board, which has a tube connected to the inlet of the outer housing; wherein the refrigerant tube is twisted and runs through the fin assemblies and the boards in a vertical orientation, which has a refrigerant inlet and a refrigerant outlet at opposite ends thereof to be extruded out of the outer housing via the fist hole and the second hole respectively for circulation of a refrigerant, and water in the outer housing is exhausted out via the outlet.
 2. The evaporator as defined in claim 1, wherein two passageways are formed in the outer housing between the evaporating device and an interior sidewall of the outer housing, which a waste heat is exhausted out of the outer housing via the passageways and the dissipating hole. 